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1455 McDowell Blvd,North Ste D <br /> Sequoia Petaluma,CA 94954 <br /> (%DAnalytical (707;792-1865 <br /> FAX 707792-0342 <br /> wvnvsequoialabs.com <br /> URS Corp-Sacramento Project: Arco Site 5469,Stockton,CA P305380 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number: WR36605 Reported: <br /> Sacramento CA,95833 Project Manager: Jay Johnson 06/18/03 21:10 <br /> Conventional Chemistry Parameters by APHA/EPA Methods <br /> Sequoia Analytical- Petaluma <br /> Reporting <br /> Analyte Result limit Units Dilution Batch Prepared Analyzed Method Note <br /> MW-1 (P305380-01)Water Sampled:05/19/03 10:10 Received:05/19/03 11:45 <br /> Chemical Oxygen Demand ND 20000 ug/l 1 3060030 06/02/03 06/02/03 EPA 410.4 <br /> Dissolved Oxygen 4400 100 3050607 05/19/03 05/19/03 EPA 360.1 <br /> Ferrous Iron 880 100 3050521 05/19/03 05/19/03 SM 3500 Fe D <br /> Phosphorus 120 50 3050535 05/20/03 05/20/03 EPA 365.3 <br /> Total Dissolved Solids 1100000 10000 3050516 05/20/03 05/20/03 EPA 160.1 <br /> Total Organic Carbon 960 800 4 3050585 05/22/03 05/22/03 EPA 415.1 <br /> MW-2(P305380-02)Water Sampled:05/19/03 09:40 Received:05/19/03 11:45 <br /> Chemical Oxygen Demand ND 20000 ug/i 1 3060030 06/02/03 06/02/03 EPA 410.4 <br /> Dissolved Oxygen 6500 100 3050607 05/19/03 05/19/03 EPA 360.1 <br /> Ferrous Iron ND 100 3050521 05/19/03 05/19/03 SM 3500 Fe D <br /> Phosphorus ND 50 3050535 05/20/03 05/20/03 EPA 365.3 <br /> Total Dissolved Solids 550000 10000 3050516 05/20/03 05/20/03 EPA 160.1 <br /> Total Organic Carbon ND 800 4 3050585 05/22/03 05/22/03 EPA 415.1 <br /> "W-3(P305380-03)Water Sampled:05/19/03 09:56 Received: 05/19/03 11:45 <br /> hemical Oxygen Demand 20000 20000 up,11 1 3060030 06/02103. 06/02/03 EPA 410.4 <br /> Dissolved Oxygen 4700 100 3050607 05/19/03 05/19/03 EPA 360.1 <br /> Ferrous Iron ND 100 3050521 05/19/03 05/19/03 SM 3500 Fe D <br /> Phosphorus ND 50 3050535 05/20/03 05/20/03 EPA 3653 <br /> Total Dissolved Solids 1700000 20000 2 3050516 05/20/03 05/20/03 EPA 160.1 <br /> Total Organic Carbon 1400 800 4 3050585 05/22/03 05/22/03 EPA 415.1 <br /> MW-4(P305380-04)Water Sampled:05/19/03 09:08 Received:05/19/03 11:45 <br /> Chemical Oxygen Demand 86000 20000 ug/1 1 3060030 06/02/03 06/02/03 EPA 410.4 <br /> Dissolved Oxygen 4600 100 " 3050607 05/19/03 05/19/03 EPA 360.1 <br /> Ferrous Iron 9500 500 5 3050521 05/19/03 05/19/03 SM 3500 Fe D <br /> Phosphorus 660 50 1 3050535 05/20/03 05/20/03 EPA 365.3 <br /> Total Dissolved Solids 990000 10000 3050516 05/20/03 05/20/03 EPA 160.1 <br /> Total Organic Carbon 5100 800 4 3050585 05/22/03 05/22/03 EPA 415.1 <br /> Sequoia Analytical-Petaluma The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document. Unless otherwise stated,results are reported on a wet weight basis. <br /> This analytical report must be reproduced in its entirety. <br /> Page IS of 36 <br />